A cobpobatiok



,J. ouRoss PAGING SYSTEM 3 Sheojs-Shoet 1 May 17, 1932 Original Filed'Nov. 29. 1924 J. DuR ss v May 17, 1932. mm SYSTEM Re. 18,466 OnginalFiled Nov. 29, 1924 s sh ts-sheet 2 J. DUROSS PAGING sYs'rEu May 17,1932.

3 Sheets-Sheet 3 Original Filed Nov, 29. 1924 liwniom .Reissned May 1?,1232 as; i8,

rarest orsics 301m nunoss, or noxnuny, massacimsnr'rs, Assrenon To THEnonrznn-caseor v ELnc'rn-rc col-arm, or ROXBUEY, massacnusnr'ranCORPORATION or massarename srs'rsm original Ho. 1319.386, dated July 2,1929, Serial No. 752,877, filed November 29, 192%. Application forreissue filed March 9, 1931. Serial No. 521,319. 4

The present invention relates to an improvement in paging systems.

Paging systems for calling a doctor vis ting a-hospital to the telephonehave been in use for some time. A simple apparatus of this typecomprises a calling unit and an annunciator, either audible'or .visible,which responds to the number indicated by the calling unit. It is asimple matter to vinstall a series of annunciatorsl of ordinary formwhere each doctor to be called is given a single unit number, but theexpense of installing an apparatus of this general type,

where the number of doctors visiting the 15 hospital is large and thebuilding is of great size, has been ve heavy.

The object of t e present inventionis to simplif the operation of pagingvapparatus, an to produce one capable of paging o a large number ofdifl'erent persons, and paging a number of them at one time. To this endthe present inventionconsists in the paging apparatus hereinafterdescribed and particularly .defined in the claims.

In the accom anying drawings illustrat-' ing the preferre form of theinvention, Fig. '1 is a schematic diagram illustrating the calling unit,one of the annunciators and the flasher unit, together with the'wiringtherefor; Fig. 2 illustrates-the calling unit; I e and Figs. 3 and 4illustrate the annunciator unit, the former figure being an elevation,and the latter a horizontal section.- The illustrated embodiment of theinvenv tion is described as follows: Referring first to the schematicdrawings, Fig. 1', the

calling unit is in charge of the operator, usually the -telephoneoperator of the hospital,.the flasher unit 11 connected therewith foruse in throwing first one signal and then another on to the line wires,and the annunicator 12 is one of' as man annunicators as it maybe,desired to install 5 throughout the hos ital buildings.

The description 0 the apparatus is as follows: The current supply,is'provided at 13.

A. wire 14 from one terminal leads to the mas= ter control switch 15, ortumbler switch, by which the operator, after malnng'the properconnection, throws the flasher into operation. 59 From the tumblerswitch 15 the wire 16 leads to the flasher motor 17, and thence to thewire 18 to the other of the two terminals 13. A tap 19 from the wire 16leads to the continuous contact 20 on the flasher unit shaft 21, whichis conveniently rotated from the motor I through a reduction gearing 21.The operator, by closing the tumbler switch, sets the flasher unit inoperation. This unitis provided, in the illustrated embodiment, with. n

, three series of flasher connections 22, 23 and 24, which are timedsuccessively to flash numbers on the annunciator. The connection 22 Iprovides three connections through the wires 25,26 and 27 with thebinding'posts 28, 29 and 30, respectively. Similarly, the connections23provide current for the bin posts 31, 32am]. 33, and the flasherconnect1ons'24 provide currentfor the binding posts 34, 35 and 36 of thecalling unit. The. osts 28 to 36, inclusive, are provided with cat ingplugs connected by calling cords by which currentis conducted to jackson the board. .Thus, in the drawings, ,Fig. 1, the post 28 is connected'to number 1' of-the series of jacks indicated by the bracket 37. The 29and 30am connected by the calling cord 'with jacks 7 and 4 of the series37. If only. one doctor were being called, his number with thisarrangement of cords would be 147. The posts 31, 32 and 33 rovidecurrent for three numbers on the series of jacks 38, and the posts 34,35 and 36providecurrentfortheseriesofjacks 39. .With each jack there isa corres onding bulls eye in the bulls eye series40. us, the operatorsets up thecallasfollowszlakingth'e I plug from 28, it is carried tojack 1inseries87; the plug-from the post 29 is inserted in jack 7andtheplugfrom post30isinsertedinjack 4: Then the. operator closes themaster conthe bulls eye series 40 series of jacks'37 are ener m1 switchor the... switch 15, the flasher as il lustrated in um sesame; diagram,Fi

unit starts,"and at every revolution of the flasher unit 21-the number147 a pears upon thus chec ing the correctness of the call and enablingthe operator to make visually I In the to row 41' of plugs thecharacters ree'tim'es appear. thesecond row 42 the characters 3 and 4.tli'ree times ap-; pear, and soon through the rows 43, 44 and 45. The.current sup lied by the flasherand' the cords to the num rs in theseveral rows is conducted by the line wires indicatedas a group bythecharacter 46 to theseveral annunciators, and so on through the series.The

connections 22, and the series of jacks 38 by the flasher connections23, and the series of jacks 39' by flasher connections 7 24. These.connections are so'tha't they do not overlap, andso that an intervalexists'bctween "simultaneoussuccessive connections. Th 1y flasherconnections 22 illuminate bulls eyes corresponding to 147, one doc'torscall; flasher connections 23 succeed connections22 and illuminateanother doctors call, and similarly flasher connections 24 energize athird doc-z" tors These succeed each other, one after the otheratregular intervals until the con-' nectionis removed by the operator. Theline wires 46, as-bef ore stated, ru.n to-the several annunciators; andit will be observed that each line wireis connected with-one of thenumbers appearing upon the .face. Thus, the hue wire 47 coming from therow number- 1 isf-connec ted throughv the vconnection 49 .with the lamp1 of theannunciand sowith each ofthe several. lineator' 12, wires.

now

number. Thus, wire 47 illuminates the lam for the'number 1, and so onthrough the severa l numbers,-the return connections being made by meansof the wires 50and 51 to the return wire or mainsup 1y 13. When number147 unit, and that n Ber |l1i'shed, an interval occurs suflicient forthe umination of two other numbers b the other flasher connection not inuse, an then the numbers 1, 4 and 7 are again illuminated 'at' theannunciator.

This number being known to the doctor and to attendants may be attractedto his attention and he will put "him self'in telephonic connection withthe calllingunit operator.

now to a description of thespecific construction of the calling unit,the box is an ordinary pluggin member with several posts 28 29,30, 31,82, 3, "34 and 86 heretofore reierred to, each provided with a cord 61and a The rows of jacks are connected certain of itscorrectness.

by the flasher.

to the annunciator, it is a 'Hle afiair consistin of a box containingin- 1 icating lamps. ach lamp *illuminateea- "1. The bank of bulls eyesare connected. with the several jacks so that the are illuininated whenthe current is supp ied to the jacks. The calls are setup first and thenthejtu'mbler switch 15 is thrown to start the flash- -er'and cause the.sendin out of the signals.

require too high a box, but by 'oflsetting the.

2 to a level-between the 1 and 3, it'is apparent that the number ma beread downward. Thus,in the set-upi ustrated, the numeralsbeingmgiven,and it will be read downward. The x is provided with a suitable base 721, 4 and 7 will be lighted when the sign al is ground glass 70. Thesetlry which'it may be attached to theoutlet box This arrangement ofan'nunciator is of ad-- vantage in a place where a cat man doctors orrsons are require to be ca ed, as the num' 'r of persons that may beidentified b using not more than three figures is large.

rtainnumbers are not used. Thus 174' is not an available; number. Forexample, the I illumination of these figureson the annuncifato'r wouldvread 147. Therefore only such .call numbers may be emplo ed as havetheir digits in ascending order.

available: 12, 1a, 14., 15, 1e, 17, 1s, 19, 10,

38 39 30 '45 46 etc.'

lit seen that calling unit provide as arate and independent-controlsforfthe in icating lam s of the annunciator. At any 'v'en time t reedoctors call numbers may simultaneously set airing the numhers-two atatime, the,'following .wouldbe 2a,724, 25, 26, 27, 28,29, 20, 34, 35,as, 37, I

the three sections of the" i up on the callin unit to be periodicallyand v successively fl ed upon the screen of the annunci'ator. Any lessernumber may also be used.- If it were desired to .modifythe apn.

paratus so asto flash successively a greater number of. doctors numbersupon the screen one after the other, this could be accomiu I plished byan additionalseries of jacks ,without any change in the annunicators.The onl chan e necessary to be made would be in ad ing asherconnectionsto the flasher unit, and to provide-a new callin unit. But inpractice'it has been 'found t at a calling of three persons at one timeis suflicicnt for ef;

ficient discharge of the duty laid upon the It will be noted'that thew1res46 form 1n-' dividual local or annunicator connections, each ofWhlCh includes one of the annumcator si als.

0 call connect1ons,-therebeing three of such The wires 25, 26 27constitute a set sets illustrated. The call connections are arranged forassociation with selected annunciator connections through the manuallyoperated calling unit, and the several sets of call connections are.energized in succession through the flasher unit.

Having thus described the invention, what is claimed is:

1. An electrical calling apparatus embodying an annunciator having aplurality of digits adapted to be made visible by electric lamps, acalling appliance having a plurallty of sets of jacks, the jacks in eachset being numbered to correspond with the indicating numbers of saidannunciator and also having a similarly-numbered-and-arranged set ofcorroborative signal lamps, electrical connec tions to connect similarlynumbered jacks of tacts of the call unit, means for closing the flasherswitching means successively, mdependent connections from the severalflasher switching means to the call unit, and a source of energyconnected at one side to all of the annunciator devices and at theotherside to the flasher switching means, whereby a plurality of callsmay be set up on the unit and successively exhibited on the set ofannunciator devices. I g

In testimony whereof I have signed my name to this specification.

JOHN nunoss,

the several sets together and to similarly numbered lamps of theannunciator and the set .of corroborativelamps,'a flasher applianceembodying a driving motor and a plurality of sets of contacts, one setfor each set of jacks, these sets of contacts being adapted as the motorruns to come into action successive: 1y, :1 setof manually-operableplugs for each set of jacks, and electrical connections from saidflasher contacts to their corresponding plugs, whereby a plurality ofcalling numbers will be successively exhibited at the annunciator andsimultaneously by the corroborative sets of lamps at the callingappliance. 2. An electrical calling apparatus embodying an annunciatorhaving a'plurality of separate electric lamps and an indicating digitassociated with each lamp, a calling apphance embodying a plurality ofsets'of jacks,

the jacks of each set being numbered'to cor respond with the indicatingnumbers of the annunciator, electrical connections to connect similarlynumbered jacks' together and to similarly numbered lamps, a plurality ofmanually-manipulated plugs for each set of vCO jacks, a flasherembodying an electric motor having a driven shaft, said shaft having aplurality of sets of contacts, one set for each set of jacks, these setsof contacts being arranged to come into action successively as theshaftv rotates, each set being associated with one of the sets of theaforesaidplugs, and electrical connections between the sets ofcontactsof the flasher and their corresponding plugs, whereby the seriesof called numbers set up on the calling appliance will be successivelyexhibited at the annunciator.

3. A pagingsystem having, in combination, a set of annunciator devices,each representinga different signal, a call unit hav ing a plurality ofsimilar sets of manually controlled calling contact devices, each setthereof having contact devices for and corre spending to the separateannunciator devices,

connections from the separate 'annunciator devices to the correspondingcontact devices of the several sets, a flasher having a plurality ofswitching means, one for each set of con-

